Amazon Linux 2023 Security Advisory: ALAS2023-2026-3152
Advisory Released Date: 2026-10-12
Advisory Updated Date: 2026-10-12
Severity:
Important
Issue Overview:
When use-git-am: true is enabled for a patch source, flatpak-builder invokes git am without disabling git hooks. A malicious source can include a post-applypatch hook, which will be executed automatically when a patch with use-git-am: true is applied. Since git itself runs unsandboxed in host context at this stage, the hook is executed with host privileges, allowing arbitrary code execution on the host. (CVE-2026-86320)
Affected Packages:
flatpak-builder
Issue Correction:
Run dnf update flatpak-builder --releasever 2023.12.20261012 or dnf update --advisory ALAS2023-2026-3152 --releasever 2023.12.20261012 to update your system.
More information on how to update your system can be found on this page: Amazon Linux 2023 documentation
New Packages:
aarch64:
flatpak-builder-debuginfo-1.4.4-1.amzn2023.0.2.aarch64
flatpak-builder-tests-1.4.4-1.amzn2023.0.2.aarch64
flatpak-builder-debugsource-1.4.4-1.amzn2023.0.2.aarch64
flatpak-builder-1.4.4-1.amzn2023.0.2.aarch64
src:
flatpak-builder-1.4.4-1.amzn2023.0.2.src
x86_64:
flatpak-builder-debuginfo-1.4.4-1.amzn2023.0.2.x86_64
flatpak-builder-debugsource-1.4.4-1.amzn2023.0.2.x86_64
flatpak-builder-tests-1.4.4-1.amzn2023.0.2.x86_64
flatpak-builder-1.4.4-1.amzn2023.0.2.x86_64